\begin{table}[htbp]\centering
\scriptsize
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Estimated treatment effects on treatment quality, by baseline level of development in the health center catchment area}
\begin{tabular}{lllllll}
\toprule
\multicolumn{2}{c}{Less developed}   &  & \multicolumn{2}{c}{More developed Subgroup} & &  \\ \cline{1-2} \cline{4-5}
Subgroup                       & ATE &  & Subgroup                            & ATE   & Difference Significant  \\ \cline{1-5}
HC2                            & 0.093***    &  & HC3                                 & 0.038      & no  \\
Low BL TQ                      &  0.090***   &  & High BL TQ                          &  0.050*     & no \\
Few alternative options &  0.096**   &  & Many alternative options    &  0.044     & no \\
HC Far &  0.060*   &  & HC Near    &  0.077*     & no \\
Rural                          &  0.108***   &  & Urban                               &  -0.030     & yes \\
No health NGO present          &  0.098***  &  & Health NGO present                  &  0.024     &  no \\
High BL U5MR                   &  0.076***   &  & Low BL U5MR                         &  0.053     &  no \\
\bottomrule
\end{tabular}
\end{table}
